[mayno]

If you have multiple octane maps and want an easy way to determine what the proper ratio would be to acheive a specific octane, here's an Excel chart that you can use to make this an easy task. FYI, pump the higher octane gas FIRST to get the full effect. Anyway, hope this helps.

http://www.gnttype.org/techarea/misc/octaneblend.xls

For those that aren't Excel savvy, do NOT edit the cells on the Mixture row (row 13). Only edit the cells for fuel 1 and 2.